IBC A-2
TypeIA / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
Unlimited / Unlimited / Unlimited
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
Unlimited / n/a / n/a / Unlimited
Basements: Unlimited area
Specific Fire Resistance:
  • Structural frame = 3 hours; 2 hours (supporting roof only)
  • Bearing walls = 3 hours (exterior); 3 hours (interior); 2 hours (interior, supporting roof only)
  • Interior nonbearing walls & partitions = NR
  • Floors = 2 hours
  • Roofs = 1½ hours; NR or fire-retardant treated wood OK if ≥ 20’ above floor immediately below
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 3 hours (based on occupancy)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: n/a
UBC A-2.1
Type I-F.R. / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
Unlimited / Unlimited / Unlimited
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
Unlimited / n/a / n/a / Unlimited
Basements: Unlimited area
Specific Fire Resistance:
  • Structural frame = 3 hours; NR or heavy timber OK for roofs if ≥ 25’ above floor
  • Bearing walls =4 hours (exterior); 3 hours (interior)
  • Interior nonbearing walls & partitions = 1 hour, fire-retardant treated wood OK
  • Floors = 2 hours
  • Roofs = 2 hours; NR or fire-retardant treated wood OK if ≥ 25’ above floor
  • Area separation walls = 4 hours (based on type of construction)
  • Corridors = 1 hour, triggered by travel distance or >1 intervening room
  • Hallways = non-rated, treated as intervening room

Specific Fire Alarm Threshold: All A-2.1 occupancies, per Fire Code
Specific Sprinkler Threshold:
  • Drinking establishments > 5000 sq ft
  • A-2.1’s in basements > 1500 sq ft

Podium Buildings: n/a
IBC A-2
Type IB / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
11 stories, 160’ / 12 stories, 180’ / 12 stories, 180’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
Unlimited / n/a / n/a / Unlimited
Basements: Unlimited area
Specific Fire Resistance:
  • Structural frame = 2 hours; 1 hour (supporting roof only)
  • Bearing walls = 2 hours (exterior); 2 hours (interior); 1 hour (interior, supporting roof only)
  • Interior nonbearing walls & partitions = NR
  • Floors = 2 hours
  • Roofs = 1 hour; heavy timber OK; NR or fire-retardant treated wood OK if ≥ 20’ above floor immediately below;
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 3 hours (based on occupancy)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type II-F.R. / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
4 stories, 160’ / 5 stories, 160’ / 5 stories, 160’ (4 stories, 160’ if spr’s used for area)
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
29,900 / 2 / 2 / 239,200 (119,600 if spr’s used for stories)
Basements: 59,800 (unsprinklered); 179,400 (sprinklered)
Specific Fire Resistance:
  • Structural frame = 2 hours; NR or heavy timber OK for roofs if ≥ 25’ above floor
  • Bearing walls =4 hours (exterior); 2 hours (interior); 2 hours (interior, supporting roof only)
  • Interior nonbearing walls & partitions = 1 hour
  • Floors = 2 hours
  • Roofs = 1 hour; NR or fire-retardant treated wood OK if ≥ 25’ above floor
  • Area separation walls = 4 hours (based on type of construction)
  • Corridors = 1 hour, triggered by travel distance or >1 intervening room
  • Hallways = non-rated, treated as intervening room

Specific Fire Alarm Threshold: All A-2.1 occupancies, per Fire Code
Specific Sprinkler Threshold:
  • Drinking establishments > 5000 sq ft
  • A-2.1’s in basements > 1500 sq ft

Podium Buildings: NP
IBC A-2
Type IIA / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
3 stories, 65’ / 4 stories, 85’ / 4 stories, 85’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
15,500 / 1.75 / 2 / 174,375
Basements: 27,125 (unsprinklered); 73,625(sprinklered)
Specific Fire Resistance:
  • Structural frame = 1 hour
  • Bearing walls = 1 hour (exterior or interior)
  • Interior nonbearing walls & partitions = NR
  • Floors = 1 hour
  • Roofs = 1 hour; heavy timber OK; NR or fire-retardant treated wood OK if ≥ 20’ above floor immediately below;
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 2 hours (based on occupancy, type of construction)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type II-1 hour / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
2 stories, 65’ / 3 stories, 65’ / 3 stories, 65’ (2stories, 65’ if spr’s used for area)
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
13,500 / 2 / 2 / 108,000 (54,000 if spr’s used for stories)
Basements: 27,000 (unsprinklered); 81,000 (sprinklered)
Specific Fire Resistance:
  • Structural frame = 1 hour
  • Bearing walls =1 hour (exterior or interior)
  • Interior nonbearing walls & partitions = 1 hour
  • Floors = 1 hour
  • Roofs = 1 hour; NR or fire-retardant treated wood OK if ≥ 25’ above floor
  • Area separation walls = 2 hours (based on type of construction)
  • Corridors = 1 hour, triggered by travel distance or >1 intervening room
  • Hallways = non-rated, treated as intervening room
  • A occ's w/ aggregate occ ld ≥ 1000 NP in basement

Specific Fire Alarm Threshold: All A-2.1 occupancies, per Fire Code
Specific Sprinkler Threshold:
  • Drinking establishments > 5000 sq ft
  • A-2.1’s in basements > 1500 sq ft

Podium Buildings:NP
IBC A-2
Type IIB / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
2 stories, 55’ / 3 stories, 75’ / 3 stories, 75’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
9,500 / 1.75 / 2 / 106,875
Basements: 16,625 (unsprinklered); 45,125 (sprinklered)
Specific Fire Resistance:
  • Structural frame = NR
  • Bearing walls = NR (exterior or interior)
  • Interior nonbearing walls & partitions = NR
  • Floors = NR
  • Roofs = NR, heavy timber OK
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 2 hours (based on occupancy, type of construction)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type II-N / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
’ / NP
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
NP
Basements: NP
Specific Fire Resistance:
Specific Fire Alarm Threshold:
Specific Sprinkler Threshold:
Podium Buildings: NP

(UBC A-2.1 occupancies not allowed in non-rated buildings)

IBC A-2
Type IIIA / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
3 stories, 65’ / 4 stories, 85’ / 4 stories, 85’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
14,000 / 1.75 / 2 / 157,500
Basements: 24,500 (unsprinklered);66,500 (sprinklered)
Specific Fire Resistance:
  • Structural frame = 1 hour
  • Bearing walls = 2 hour (exterior); 1 hour (interior)
  • Interior nonbearing walls & partitions = NR
  • Floors = 1 hour
  • Roofs = 1 hour; heavy timber OK; NR or fire-retardant treated wood OK if ≥ 20’ above floor immediately below;
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 3 hours (based on occupancy)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type III-1 hour / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
2 stories, 65’ / 3 stories, 65’ / 3 stories, 65’ (2stories, 65’ if spr’s used for area)
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
13,500 / 2 / 2 / 108,000 (54,000 if spr’s used for stories)
Basements: 27,000 (unsprinklered); 81,000 (sprinklered)
Specific Fire Resistance:
  • Structural frame = 1 hour
  • Bearing walls = 4 hour NC (exterior); 1hour (interior)
  • Interior nonbearing walls & partitions = 1 hour
  • Floors = 1 hour
  • Roofs = 1 hour
  • Area separation walls = 4 hours (based on type of construction)
  • Corridors = 1 hour, triggered by travel distance or >1 intervening room
  • Hallways = non-rated, treated as intervening room
  • A occ's w/ aggregate occ ld ≥ 1000 NP in basement

Specific Fire Alarm Threshold: All A-2.1 occupancies, per Fire Code
Specific Sprinkler Threshold:
  • Drinking establishments > 5000 sq ft
  • A-2.1’s in basements > 1500 sq ft

Podium Buildings: NP
IBC A-2
Type IIIB / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
2 stories, 55’ / 3 stories, 75’ / 3 stories, 75’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
9,500 / 1.75 / 2 / 106,875
Basements: 16,625 (unsprinklered); 45,125 (sprinklered)
Specific Fire Resistance:
  • Structural frame = NR
  • Bearing walls = 2 hours (exterior); NR (interior)
  • Interior nonbearing walls & partitions = NR
  • Floors = NR
  • Roofs = NR, heavy timber OK
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 3 hours (based on occupancy)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type III-N / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
’ / NP
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
NP
Basements: NP
Specific Fire Resistance:
Specific Fire Alarm Threshold:
Specific Sprinkler Threshold:
Podium Buildings: NP

(UBC A-2.1 occupancies not allowed in non-rated buildings)

IBC A-2
Type IV HT / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
3 stories, 65’ / 4 stories, 85’ / 4 stories, 85’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
15,000 / 1.75 / 2 / 168,750
Basements: 26,250 (unsprinklered); 71,250 (sprinklered)
Specific Fire Resistance:
  • Structural frame = HT
  • Bearing walls = 2 hour (exterior); 1 hour or HT (interior)
  • Interior nonbearing walls & partitions = 1 hour or solid wood
  • Floors = HT
  • Roofs = HT
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 3 hours (based on occupancy)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type IV HT / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
2 stories, 65’ / 3 stories, 65’ / 3 stories, 65’ (2stories, 65’ if spr’s used for area)
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
13,500 / 2 / 2 / 108,000 (54,000 if spr’s used for stories)
Basements: 27,000 (unsprinklered); 81,000 (sprinklered)
Specific Fire Resistance:
  • Structural frame = 1 hour or HT
  • Bearing walls = 4 hour NC (exterior); 1 hour (interior)
  • Interior nonbearing walls & partitions = 1 hour or HT
  • Floors = HT
  • Roofs = HT
  • Area separation walls = 4 hours (based on type of construction)
  • Corridors = 1 hour, triggered by travel distance or >1 intervening room
  • Hallways = non-rated, treated as intervening room
  • A occ's w/ aggregate occ ld ≥ 1000 NP in basement

Specific Fire Alarm Threshold: All A-2.1 occupancies, per Fire Code
Specific Sprinkler Threshold:
  • Drinking establishments > 5000 sq ft
  • A-2.1’s in basements > 1500 sq ft

Podium Buildings: NP
IBC A-2
TypeVA / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
2 stories,50’ / 3 stories, 70’ / 3 stories, 70’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
11,500 / 1.75 / 2 / 129,375
Basements: 20,125 (unsprinklered);54,625 (sprinklered)
Specific Fire Resistance:
  • Structural frame = 1 hour
  • Bearing walls = 1 hour (exterior or interior)
  • Interior nonbearing walls & partitions = NR
  • Floors = 1 hour
  • Roofs = 1 hour; heavy timber OK; NR or fire-retardant treated wood OK if ≥ 20’ above floor immediately below;
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 2 hours (based on occupancy, type of construction)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type V-1 hour / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
2 stories, 50’ / 3 stories, 50’ / 3 stories, 50’ (2stories, 50’ if spr’s used for area)
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
10,500 / 2 / 2 / 84,000 (42,000 if spr’s used for stories)
Basements: 21,000 (unsprinklered); 63,000 (sprinklered)
Specific Fire Resistance:
  • Structural frame = 1 hour
  • Bearing walls = 1 hour (exterior or interior)
  • Interior nonbearing walls & partitions = 1 hour
  • Floors = 1 hour
  • Roofs = 1 hour
  • Area separation walls = 2 hours (based on type of construction)
  • Corridors = 1 hour, triggered by travel distance or >1 intervening room
  • Hallways = non-rated, treated as intervening room
  • A occ's w/ aggregate occ ld ≥ 1000 NP in basement

Specific Fire Alarm Threshold: All A-2.1 occupancies, per Fire Code
Specific Sprinkler Threshold:
  • Drinking establishments > 5000 sq ft
  • A-2.1’s in basements > 1500 sq ft

Podium Buildings: NP
IBC A-2
Type VB / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
1 story, 40’ / 2 stories, 60’ / 2 stories, 60’
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
6,000 / 1.75 / 2 / 45,000
Basements: 10,500 (unsprinklered); 28,500 (sprinklered)
Specific Fire Resistance:
  • Structural frame = NR
  • Bearing walls = NR (exterior & interior)
  • Interior nonbearing walls & partitions = NR
  • Floors = NR
  • Roofs = NR
  • Fire barriers between fire areas = 2 hours
  • Fire walls = 2 hours (based on occupancy, type of construction)
  • Corridors = 1 hour (unsprinklered), 0.5 hours (sprinklered) @ occupant load 30
  • 4-story unenclosed escalator or non-MOE stair allowed

Specific Fire Alarm Threshold: Manual system @ occupant load ≥ 300
Specific Sprinkler Threshold:
  • All A-2 occupancies where fire area > 5000 sq ft; OR occupant load > 100; OR the A-2 is not on the floor of exit discharge
  • Required on all floors between the A-2 and the floor of exit discharge

Podium Buildings: Separate bldgs for area & number of stories; A’s occ ld < 300; height measured fr grade plane
UBC A-2.1
Type V-N / Max Height w/o Sprinklers
Thresholds / Max Height w/ Sprinklers
Thresholds / MaxBuilding Height
’ / NP
Allowable Area per Table / Frontage Increase / Sprinkler Increase / MaxBuilding Area
NP
Basements: NP
Specific Fire Resistance:
Specific Fire Alarm Threshold:
Specific Sprinkler Threshold:
Podium Buildings: NP

(UBC A-2.1 occupancies not allowed in non-rated buildings)